TÍNH CHẤT LÝ HÓA CỦA THAN SINH HỌC TỪ BÃ MÍA

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Tác giả: Đạt Phương Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2023

Mô tả vật lý: tr.46010

Bộ sưu tập: Báo, Tạp chí

ID: 336981

Thêm vào giỏ Liên kết toàn văn

Mục tiêu của nghiên cứu này là xác định một số tính chất lý hóa của than sinh học từ bã mía ở nhiệt độ nhiệt phân 500oC và 700oC. Than sinh học được chế tạo bằng phương pháp nhiệt phân (500oC và 700oC) bằng lò nung VMF 165, tốc độ khí nitơ được bơm vào lò là 3 L phút−1 để loại bỏ không khí trong lò. Sau đó, nhiệt độ lò được nâng lên từ nhiệt độ phòng đến 500oC và 700oC với tốc độ gia nhiệt 10°C phút−1. Thí nghiệm được bố trí hoàn toàn ngẫu nhiên với 2 nghiệm thức và 3 lần lặp lại cho mỗi nghiệm thức. Kết quả SEM cho thấy than sinh học từ bã mía ở nhiệt độ 500oC và 700oC có cấu trúc lỗ rỗng cao hơn rất nhiều so với bã mía thô. Năng suất than sinh học từ bã mía ở 500oC cao hơn 700oC lần lượt là 28,19% và 21,18%. Giá trị pH, EC, CEC của than sinh học từ bã mía đều tăng khi nhiệt độ tăng. Hàm lượng cacbon cao nhất ở 700oC đạt 38,97%. Giá trị pHpzc ở 500oC là 8,26 và ở nhiệt độ 700oC là 9,29.The aim of this study was to determine some physico-chemical properties of biochar from sugarcane bagasse at pyrolysis temperature of 500oC and 700oC. Biochar was produced by pyrolysis method (500oC and 700oC) by a kiln - VMF 165, the nitrogen gas was pumped into the furnace at a rate of 3 L min−1 to remove the air from inside of the furnace. The kiln temperature was increased from room temperature to 500°C and 700°C at a heating rate of 10°C min−1. The treatments were randomly arranged with 2 treatments and 3 replicates for each treatment. Results of SEM show that biochar from sugarcane bagasse at a pyrolysis temperature of 500oC and 700oC has a pore structure which is much higher than raw bagasse. Biochar yield at 500oC is higher than 700oC by 28.19% and 21.18%, respectively. The pH, EC, and CEC values of biochar from sugarcane bagasse are increased with increasing temperature. The high carbon content at 700oC has reached 38.97%. The pHpzc value at 500oC is 8.26 and at 700oC, it is 9.29.

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